Push-pull cart with convenient wheel locking structure

Abstract

The utility model relates to the technical field of push-and-pull vehicles, in particular to a push-and-pull vehicle with a convenient wheel locking structure, which comprises a support plate, driving wheels and a lifting locking component, the driving wheels are symmetrically arranged on one side of the bottom of the support plate, auxiliary wheels are symmetrically arranged on the other side of the bottom of the support plate, the tops of the driving wheels are coupled with a connecting frame, and the lifting locking component is connected with the connecting frame. The driving wheel and the supporting plate are detachably installed, an inner plastic groove is formed in the inner side of the driving wheel, side arc grooves are evenly formed in the periphery of a circular groove of the inner plastic groove, locking rods are movably arranged on the inner sides of the inner plastic grooves in the two sides, a limiting piece is installed on one side of the outer portion of the connecting frame, and the top of the limiting piece is fixedly connected with the supporting plate; the problems that in the prior art, an existing push-pull vehicle usually adopts a combination of a guide wheel and a directional wheel as a moving part, but when the directional wheel is used for locking the push-pull vehicle, locking and fixing of each directional wheel need to be independently fixed, the fixing efficiency is low, and the using process is inconvenient are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of push-pull carts, in particular to a push-pull cart with a convenient wheel locking structure. Background Art

[0002] A push-pull cart is a transport vehicle that is pushed or pulled by human power. It is usually composed of a body, wheels, handles, and a drawstring (some models may not include a drawstring). Its simple structure but powerful function can help people move items quickly and conveniently.

[0003] Existing push-pull carts usually use a combination of guide wheels and directional wheels as moving parts. However, when using the directional wheels to lock the push-pull cart, each directional wheel needs to be locked separately, which has low fixing efficiency and is inconvenient to use.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a push-pull cart with a convenient wheel locking structure is proposed, in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of the present invention is to provide a push-pull cart with a convenient wheel locking structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a push-pull cart with a convenient wheel locking structure, comprising a support plate, a driving wheel and a lifting locking assembly, wherein a driving wheel is symmetrically arranged on one side of the bottom of the support plate, and an auxiliary wheel is symmetrically arranged on the other side of the bottom of the support plate, the top axis of the driving wheel is connected to a connecting frame, which can be detachably mounted on the support plate, an inner plastic groove is provided on the inner side of the driving wheel, and side arc grooves are evenly provided around the circular groove of the inner plastic groove, and locking rods are movably provided on the inner sides of the inner plastic grooves on both sides, a limiting plate is installed on one side of the outer side of the connecting frame, and the top of the limiting plate is fixedly connected to the support plate, a limiting groove is provided inside the limiting plate, and the locking rod passes through the inner side of the limiting groove, the outer wall of the locking rod is sleeved with a movable plate, and open grooves are provided on both sides of the inner side of the movable plate;

[0007] The support plate is provided with a side frame on one side of the bottom of the limit plate, and a positioning side plate is installed on one side of the side frame close to the locking rod, and side plate grooves are opened on both sides of the positioning side plate, the side plate grooves and the open grooves are matched with each other, and traction rods are horizontally embedded at the connection between the two groups of side plate grooves and the open grooves, a traction spring is provided at the connection between the traction rod and the locking rod, and a second downward pressing spring is provided on the inner top of the positioning side plate;

[0008] The outside of the traction rod is provided with a lifting and locking assembly, and the lifting and locking assembly includes a rotating plate and a shaft bolt. The rotating plate rotates as a whole around the shaft bolt, and the rotation of the rotating plate can drive the traction rod to rise and fall.

[0009] Furthermore, the lifting and locking assembly also includes a lifting connecting rod and a first pressing spring piece. The lifting connecting rod is provided at one end of the rotating plate away from the traction rod, and the first pressing spring piece is provided on the top of the lifting connecting rod.

[0010] Furthermore, the rotating plate drives the traction rod to move up and down by rotating, and a snap connection is formed between the support plate and the first downward-pressing elastic sheet.

[0011] Furthermore, the traction rod is movably elastically connected to the locking rod via a traction spring.

[0012] Furthermore, the traction rod passes through the side plate groove of the positioning side plate and also passes through the opening groove of the movable plate, so that a movable connection is formed among the movable plate, the traction rod and the positioning side plate.

[0013] Furthermore, the upper and lower positions of the traction rod and the second downward-pressing spring piece cooperate with each other.

[0014] Furthermore, a snap-fit ​​connection is formed between the support plate and the second downward-pressing elastic sheet.

[0015] The utility model provides a push-pull cart with a convenient wheel locking structure, which has the following beneficial effects:

[0016] 1. The utility model adopts a special structural design for the driving wheel, with a surrounding side arc groove design on the inside. The locking of the driving wheel is achieved by whether the locking rod is in the side arc groove. Through a single control, the opening and closing of the double sets of driving wheels are achieved, and the entire locking process is efficient and convenient.

[0017] 2. In the present invention, the locking rod is restricted by the limiting plate so that it can only slide within the slotted area of ​​the limiting groove; the bottom of the support plate is installed with a positioning side plate and a side frame. By using the traction rod in the side plate slot of the positioning side plate, the second downward pressing spring plate at the top is pressed to drive the traction rod downward, thereby pushing the movable plate connected to it to move downward, causing the movable plate to drive the locking rod to move toward the inside of the inner plastic groove, so that the driving wheel can rotate normally and is in the unlocked state;

[0018] The first downward-pressing spring piece and the second downward-pressing spring piece have the same structure. By pressing the first downward-pressing spring piece, the rotating plate at the bottom is pressed downward, thereby lifting the other end of the rotating plate. The tilting rod structure is used to drive the traction rod to rise, so that the traction rod pulls the movable piece, which drives the locking rod to be embedded in the side arc groove, thereby realizing the synchronous locking of the driving wheels on both sides.

[0019] 3. In the present invention, the traction spring can provide a certain elastic support during descent, so that the locking rod can be quickly separated from the side arc groove, thereby realizing rapid unlocking of the driving wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. Those skilled in the art will readily understand that these drawings are merely used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a push-pull cart with a convenient wheel locking structure according to the present invention;

[0022] Figure 2 This is a schematic side view of the three-dimensional structure of the driving wheel of a push-pull vehicle with a convenient wheel locking structure according to the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of a lifting and locking assembly of a push-pull cart with a convenient wheel locking structure according to the present invention.

[0024] In the figure: 1. Support plate; 2. Driving wheel; 201. Inner plastic groove; 202. Side arc groove; 203. Connecting frame; 3. Auxiliary wheel; 4. Traction spring; 5. Lifting locking assembly; 501. Rotating plate; 502. Lifting connecting rod; 503. First downward pressure spring; 504. Axle bolt; 6. Second downward pressure spring; 7. Movable plate; 701. Opening groove; 8. Traction rod; 9. Positioning side plate; 901. Side plate groove; 10. Side frame; 11. Limiting plate; 12. Limiting groove; 13. Locking rod; 14. Removable rod; 1401. Cross bar; 1402. Side notch groove; 1403. Limiting bolt. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-3The utility model provides a technical solution: a push-pull cart with a convenient wheel locking structure, comprising a support plate 1, a driving wheel 2 and a lifting locking assembly 5. The driving wheel 2 is symmetrically arranged on one side of the bottom of the support plate 1, and the auxiliary wheel 3 is symmetrically arranged on the other side of the bottom of the support plate 1. The top axis of the driving wheel 2 is connected to a connecting frame 203, which can be detachably installed with the support plate 1. An inner plastic groove 201 is opened on the inner side of the driving wheel 2, and side arc grooves 202 are evenly opened around the circular groove of the inner plastic groove 201. Locking rods 13 are movably set on the inner sides of the inner plastic grooves 201 on both sides. A limiting plate 11 is installed on one side of the outside of the connecting frame 203, and the top of the limiting plate 11 is fixedly connected to the support plate 1. A limiting groove 12 is opened inside the limiting plate 11, and the locking rod 13 passes through the inner side of the limiting groove 12. The outer wall of the locking rod 13 is sleeved with a movable plate 7, and open grooves 701 are opened on both sides of the inner side of the movable plate 7.

[0027] A side frame 10 is provided on the bottom side of the support plate 1 near the limiting piece 11, and a positioning side plate 9 is installed on the side of the side frame 10 near the locking rod 13, and side plate grooves 901 are opened on both sides of the positioning side plate 9. The positions of the side plate grooves 901 and the opening grooves 701 match each other, and a traction rod 8 is horizontally embedded at the connection between the two groups of side plate grooves 901 and the opening groove 701. A traction spring 4 is provided at the connection between the traction rod 8 and the locking rod 13, and a second downward pressure spring 6 is provided on the inner top of the positioning side plate 9;

[0028] The outside of the traction rod 8 is provided with a lifting locking assembly 5, which includes a rotating plate 501 and a shaft bolt 504. The rotating plate 501 rotates as a whole around the shaft bolt 504, and the rotation of the rotating plate 501 can drive the traction rod 8 to rise and fall; the lifting locking assembly 5 also includes a lifting connecting rod 502 and a first pressing spring piece 503. The lifting connecting rod 502 is provided at one end of the rotating plate 501 away from the traction rod 8, and the top of the lifting connecting rod 502 is provided with a first pressing spring piece 503; the rotating plate 501 is lifted by The rotation drives the traction rod 8 to move up and down, and a snap connection is formed between the support plate 1 and the first downward-pressing elastic piece 503; the traction rod 8 is movably elastically connected between the traction spring 4 and the locking rod 13; the traction rod 8 passes through the side plate groove 901 of the positioning side plate 9, and also passes through the opening groove 701 of the movable piece 7, so that a movable connection is formed between the movable piece 7, the traction rod 8 and the positioning side plate 9; the upper and lower positions of the traction rod 8 and the second downward-pressing elastic piece 6 cooperate with each other; a snap connection is formed between the support plate 1 and the second downward-pressing elastic piece 6;

[0029] The driving wheel 2 adopts a special structural design, with a surrounding side arc groove 202 on the inside. The locking of the driving wheel 2 is achieved by whether the locking rod 13 is in the side arc groove 202. Through a single control, the opening and closing of the dual sets of driving wheels 2 can be achieved, and the entire locking process is efficient and convenient.

[0030] The locking rod 13 is restricted by the limiting plate 11 so that it can only slide within the slotted area of ​​the limiting groove 12; the bottom of the support plate 1 is installed with a positioning side plate 9 and a side frame 10. By using the traction rod 8 in the side plate slot 901 of the positioning side plate 9, by pressing the second downward pressing spring plate 6 at the top, the traction rod 8 is driven to descend, thereby pushing the movable plate 7 connected thereto to descend, causing the movable plate 7 to drive the locking rod 13 to move toward the inside of the inner plastic groove 201, so that the driving wheel 2 can rotate normally and is in the unlocked state;

[0031] The first pressing spring piece 503 and the second pressing spring piece 6 have the same structure. The pressing of the first pressing spring piece 503 drives the bottom rotating plate 501 to press down, thereby lifting the other end of the rotating plate 501. The tilting lever structure drives the traction rod 8 to rise, so that the traction rod 8 pulls the movable piece 7, which drives the locking rod 13 to be embedded in the side arc groove 202, thereby achieving synchronous locking of the driving wheels 2 on both sides.

[0032] The traction spring 4 can provide a certain elastic support during descent, so that the locking rod 13 can be quickly separated from the side arc groove 202, thereby quickly unlocking the driving wheel 2;

[0033] The first pressing spring piece 503 and the second pressing spring piece 6 are respectively embedded in the top support plate 1 and engage with each other when they are lowered to a certain position. When starting and locking are required, the corresponding pressing spring piece is manually unlocked.

[0034] The detachable rod 14 at the top is threadedly connected to the support plate 1, so that the detachable rod 14 can be portable and disassembled, and a cross bar 1401 is sleeved on the detachable rod 14. The curved surface of the detachable rod 14 is used to limit the cross bar 1401, and the outer limiting bolt 1403 is used to limit the side notch groove 1402 to complete the assembly and locking of the handle part.

[0035] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or substitutions that can be thought of by any technician familiar with the field within the technical scope disclosed by the present invention without creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A push-pull cart with a convenient wheel locking structure, comprising a support plate (1), a driving wheel (2) and a lifting locking assembly (5), wherein the driving wheel (2) is symmetrically arranged on one side of the bottom of the support plate (1), and the auxiliary wheel (3) is symmetrically arranged on the other side of the bottom of the support plate (1), and the characteristics are: The top axis of the driving wheel (2) is connected to a connecting frame (203), which is detachably mounted on the support plate (1). An inner plastic groove (201) is provided on the inner side of the driving wheel (2), and side arc grooves (202) are evenly provided around the circular groove of the inner plastic groove (201). Locking rods (13) are movably provided on the inner sides of the inner plastic grooves (201) on both sides. A limiting plate (11) is installed on one side of the outer side of the connecting frame (203), and the top of the limiting plate (11) is fixedly connected to the support plate (1). A limiting groove (12) is provided inside the limiting plate (11), and the locking rod (13) passes through the inner side of the limiting groove (12). A movable plate (7) is sleeved on the outer wall of the locking rod (13), and open grooves (701) are provided on both sides of the inner side of the movable plate (7). The support plate (1) is provided with a side frame (10) on the bottom side close to the limiting plate (11), and a positioning side plate (9) is installed on the side of the side frame (10) close to the locking rod (13), and side plate grooves (901) are opened on both sides of the positioning side plate (9), the positions of the side plate grooves (901) and the opening grooves (701) are matched with each other, and a traction rod (8) is horizontally embedded at the connection between the two groups of the side plate grooves (901) and the opening grooves (701), a traction spring (4) is provided at the connection between the traction rod (8) and the locking rod (13), and a second downward pressing spring (6) is provided on the inner top of the positioning side plate (9); A lifting and locking assembly (5) is provided on the outside of the traction rod (8), and the lifting and locking assembly (5) comprises a rotating plate (501) and a shaft bolt (504). The rotating plate (501) rotates as a whole around the shaft bolt (504), and the rotation of the rotating plate (501) can drive the traction rod (8) to rise and fall. Detachable rods (14) are threadedly mounted on both sides of the top of the support plate (1), and two groups of the detachable rods (14) are sleeved with cross bars (1401) on the outside, and side notch grooves (1402) are provided on both sides of the cross bars (1401). Limiting bolts (1403) are installed on the outside of the detachable rods (14), and the positions of the limiting bolts (1403) and the side notch grooves (1402) cooperate with each other.

2. A push-pull cart with a convenient wheel locking structure according to claim 1, characterized in that: The lifting and locking assembly (5) further comprises a lifting connecting rod (502) and a first pressing spring piece (503); the lifting connecting rod (502) is provided at one end of the rotating plate (501) away from the traction rod (8); and the first pressing spring piece (503) is provided at the top of the lifting connecting rod (502).

3. The push-pull cart with a convenient wheel locking structure according to claim 2, characterized in that: The rotating plate (501) drives the traction rod (8) to move up and down by rotating, and a snap connection is formed between the support plate (1) and the first downward pressing spring sheet (503).

4. The push-pull cart with a convenient wheel locking structure according to claim 1, characterized in that: The traction rod (8) is movably elastically connected to the locking rod (13) via a traction spring (4).

5. The push-pull cart with a convenient wheel locking structure according to claim 1, characterized in that: The traction rod (8) passes through the side plate groove (901) of the positioning side plate (9) and also passes through the opening groove (701) of the movable plate (7), so that a movable connection is formed among the movable plate (7), the traction rod (8) and the positioning side plate (9).

6. The push-pull cart with a convenient wheel locking structure according to claim 1, characterized in that: The upper and lower positions of the traction rod (8) and the second downward-pressing elastic sheet (6) cooperate with each other.

7. The push-pull cart with a convenient wheel locking structure according to claim 1, characterized in that: A snap-fit ​​connection is formed between the support plate (1) and the second downward-pressing elastic sheet (6).

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